Dust-guard.



PATENTED NOV. 8, 1904.

E. DBBGRE.

DUST GUARD.

APYLIUATION FILED JAN. 5,'1904.

N0 MODEL.

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Patented November 8, 1904.

IINTTDD STATES- PATENT Ormea.,

i EDIVARD DENEGRE, OF CHICAGO, ILLINOIS, ASSIGNOR TO MCCORD & COM- PAN Y,

OF CHICAGO, ILLINOIS, A CORPORATION OF NEW JERSEY.

DUST-GUARD.

SPECIFICATION forming part of Letters Patent No. 774,652, dated.v November 8, 1904.

Application led January 8, 1904.

To nl? wit/)7n if Nur/y con/067%:

Beit known that I, EDWARD DENEGRE, a citizen of the United States, residing at Chicago, in the county ot' Cook and State of Illinois, have invented certain new and useful Improvements in Dust-Guards; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled inthe art to which IO it appertains to make and use the same.

My invention has for its object to provide an improved dust-guard for car-axle journalboxes; and to this end the invention consists of the novel devices and combinations of devices hereinafter described, and defined in the claims.

The invention is illustrated in the accompanying drawings, wherein like notations refer tolike parts throughout the several views. In said drawings, Figure l is a view, chiefly in elevation, but partly in section, showing my improved dust-guard in working position, some parts being removed and ,others broken away. Fig'. 2 is a vertical cross-section on the line :1F mi of Fig. l. Fig. 3 is a horizontal section on the line .fc3 of Fig. 2, some parts being broken away. Fig. 4isavertical section on the line l#of Fig. 2, showing the packing-ring and guard-plate detached from the box and pulled apart from each other. Fig. 5 is a view in elevation, showing the packing-ring detached, the spring positions being shown in dotted lines. Fig. 6 is an inside elevation showing theguard-plate detached with the springs in their pocket and a portion oit' one of the hook-lugs broken away, and Fig. 7 is a detail in Vvertical section on the line Q27 m7 of Fig'. 2.

The reference-letters a, a', and a represent l0 the car-axle, the part t being the body portion, the part the journal, and a the intermediate portion subject to the dust-guard.

The box b may be of the ordinary or any suitable construction and is provided with a raised boss 7)', surrounding the axle-passage at the rearend of the box, and which boss is machined or faced to afford the surface to be packed. Said box is also provided with lock-flanges b2 at the sides of its rear end.

Serial No. 188,157. (No model.)

The reference-letters 3 and represent, re- 50 spectively, the brass and the key applied in the usual way.

rl`he guard-plate is integral and is made up of the main or body portion c, lateral extensions or ear-lugs c', provided with spring- 55 pockets c2 on their inner profile faces, and which ear-lugs c have also formed integral therewith hook-lugs c3 for engagement with the lock-flanges 62 of the box. The body portion of the guard-plate is provided with the customary opening or axle-passage and with an inturned peripheral flange c4, adapted to embrace or encircle the packing-ring CZ, and is of proper shape in cross-section to receive and seat the said packing-ring.

The packing-ring (Z is preferably composed of gray iron, practice having demonstrated that to be the best material for the purpose, but may ot' course be composed of any other suitable material. VSaid packing-ring l is 70 provided with lateral extensions or'ear-lugs CZ', adapted to underlie the lateral extensions or ear-lugs c of the guard-plate when the parts are in working' position. The hub oi' the packing-ring d is cut away directly adja- 75 cent to the ear-lugs cl', as shown at (Z2, to afford clearance for the proper application of the springs e. Said springs e are haltl elliptic in form, adapted to rest in the pockets c2, provided in the ear-lugs c of the guard-plate, SO with the bow portions of the springs bearing against the ear-lugs d of the packing-ring when the parts are in working position, as best shown in Figs. 2, 3, and 7. The packing-ring is interposed between the guard-plate 3 5 and the box, the inner proiile face thereof' being machined or planed and adapted to pack the boss b of the box. The hub portion otl the packing-ring snugly tits the axle and is adapted to pack the same. The pack- 9 O ing-ring is integral or solid.

In applying the dust-guard in working position the springs e are compressed under the act of making the hook-flanges c3 oi' the guardplate engage with the lock-flanges b2 ot' the 95 box and thereafter react between the guardplate and the packing-ring, thus serving' yieldingly to clamp the dust-guard to the box and to hold the packing-ring with its face tightly l hugging the face of the box-boss b'. The l tension of strength of the springs e is such that when the parts are in working position i the dust-guard will be carried by the box. l thus relieving the axle from any of the load i thereof and avoiding the wear and tear on the i axle which would otherwise be produced. l It is of course obvious that the dustgiiard l is free to move with the axle in respect to the l box under the motions peculiar to the service, while at all times the packing-ring will be l yieldingl y held in its proper packing position. Actual service has demonstrated the effil ciency of the dust-guard above described for the purposes had in view.

With the dust-guard constructed as above i Adescribed it must be obvious that no parts are exposed where they can be easily tampered with, displaced, or lost and that the springs plate and ring in all the movements incidental to the service without sliding' wear and tear on the springs. Hence the tension of the springs is constant and they will last fora longer time.

What I claim,

l are seciiiel y housed and carried with the guardand desire to secure by Let- 1 ters Patent of the United States, is as follows: l. The combination with a Journal-box, of a dust-guard comprising a guard-plate having' means for engagement with the box and provided with spring-pockets, a packing-ring interposed between the guard-plate and the box, and springs seated in said pockets and reacting between the guard-plate and the packingring and serving yieldingly to clamp the dustguard to the box, and to hold the packingring in packing position, and always moving with the guardeplate thereby avoiding sliding friction on the springs, substantially as described.

2. The combination with a journal-box provided with lock-flanges, of the guard-plate a having the ear-lugs c/,w'ith spring-pockets c, and provided with the hook-lugs c3 for en gagement with said box-flanges, the packingring (Z, provided with the ear-lugs CZ', interposed between the guard-plate and the box, and the springs e seated in said pockets ci: of the guard-plate and reacting between the guard-plate and the lugs d of the packingring, when the parts are in working position, all for cooperation, substantially as described.

In testimony whereof I afiix iny signature in presence of two Witnesses.

EDWARD DENEGRE.

Witnesses:

ROBERT C. MABEY, JAMES D. DiiNneiiii. 

